where \(q\)  is the same as in (REF ).
The proof can be found in [1]}, where these results are proved for degenerate elliptic operators in the upper half-space. The argument of [1]} applies to the operators under discussion. We also remark that for bounded (Lipschitz) domains, the kernel function estimates used to prove (REF ) for operators with \(L^\infty \)  coefficients can be found in [3]} and [4]}, while for elliptic operators with \(\operatorname{BMO}\)  anti-symmetric part these are verified in [5]}.
